LUMBER WORKING AND DEVICE TO THIS END Russian patent published in 2014 - IPC B27K5/04 

FIELD: process engineering.

SUBSTANCE: invention relates to woodworking, particularly, to lumber processing. Lumber is impregnated in sealed container with modifying solution, dried and heat treated. Blanks are heated and compacted by heaters to be heated to 200°C. Said blanks are compacted by thermal-compression insert increasing smoothly of compaction force from 0 to 30 MPa depending upon heating temperature. Heating and deformation of initial lumber are started with impregnation stage. Proposed device comprises tight housing (1) of autoclave equipped with means for degassing and modifying agent solution feed. Said autoclave housing accommodates the car (6) whereat plies of wood blanks (7) are separated by heating compactors consisting of heater (2), pressure plates (4) and 3D element composed by resilient thermal-compression insert (3). Top limiter plate (5) can be secured at both autoclave housing and car bearing struts. Said heater consists of heating plate with heaters arranged thereon. Said heaters and compactors are arranged in layers over the lumber stack height. Said thermal-compression inserts are made of resilient material reinforced perpendicularly that features high linear expansion factor arranged on both side of said heating plate. Moving pressure plates are secured at said inserts from above and below.

EFFECT: higher quality of modified lumber and simplified design.

5 cl, 1 tbl, 1 dwg